A, in the installation of heating pipes at the same time or before the filling layer construction, heating and refrigeration system installation unit shall set the filling layer expansion joints according to the following requirements. When the ground area is greater than 30m2 or the side length is greater than 6m, expansion joints shall be set with the spacing not greater than 6m and the width not less than 8mm. Expansion joints shall be made of high foamed polyethylene foam plastic board, or the preset battens shall be taken out after the construction of the filling layer is completed, and the joints shall be filled with elastic expansion paste. Expansion joints should be from the upper edge of insulation layer to the upper edge of filling layer.
Second, after the pipeline laying is completed and checked to meet the design requirements, the water pressure test should be carried out. And meet the following requirements: the water pressure test should be carried out after the system is flushed. System flushing should first flush the main supply and return pipe outside the water separator and water collector, and then flush the indoor heating system after passing the test; Before the water pressure test, safe and effective fixing and protection measures should be taken for the pressure test pipes and components; Hydrostatic test should be carried out loop by loop for each group of water separator and water collector. The indoor system pressure test of the concrete filled heating/cooling device shall be conducted twice before pouring the concrete filled layer and after the curing period of the filled layer expires.
Thirdly, in the pre-test process, clean water is filled into the system and air is exhausted, and the pressure is raised to the test pressure with a booster pump. Repeat the work within the next 30 minutes, with an interval of 10 minute, and do it twice again to increase the pressure to the test pressure. After another 30 minutes, the test pressure should not be reduced by more than 60 kPa. During the main test, the main test shall be started immediately after the pre-test. Under the pre-test pressure, stabilize the pressure for 2 hours and observe its pressure drop. If the pressure drop is not more than 20kPa, it is considered qualified.
What are the construction specifications for floor heating? After listening to the introduction of this article, everyone has a certain understanding, hoping to help you.